FIS-B lookahead for SUA Status
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While reading over the FDC NOTAMs, I saw this interesting entry come up:

AIRSPACE SPECIAL NOTICE..THE FLT INFO SERVICES BCST (FIS-B) SERVICE FOR OAKLAND /ZOA/ ARTCC AIRSPACE IS REDUCING ITS FIS-B PRODUCT LOOKAHEAD RANGE TO 5NM FOR THE SPECIAL USE AIRSPACE (SUA STATUS) PRODUCT. SUA STATUS INFO CONTINUES TO BE PROVIDED VIA THE FIS-B NOTAM PRODUCT. ALL FIS-B PRODUCT FORMATS REMAIN UNCHANGED. THIS UPDATE WILL OCCUR BTN 1400-1600 ON JUNE 11 2020.

Am I understanding this correctly to mean that SUA status sent over FIS-B will only cover a 5nm "hockey puck" around the aircraft? That seems incredibly small — you'd have to be practically on top of a piece of special-use airspace before you'd get any information about it.

Anybody know what the story here is?